update project entry point

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "description": "A utility-first CSS framework for rapid UI development.",
   "license": "MIT",
+  "main": "lib/index.js",
   "bin": {
     "tailwind": "lib/cli.js"
   },

src/build.js

@@ -1,6 +1,6 @@
 import fs from 'fs'
 import postcss from 'postcss'
-import tailwind from './tailwind'
+import tailwind from '..'
 import defaultConfig from './defaultConfig'
 
 console.info('Building Tailwind!')

src/index.js

@@ -12,7 +12,7 @@ import substituteHoverableAtRules from './lib/substituteHoverableAtRules'
 import substituteResponsiveAtRules from './lib/substituteResponsiveAtRules'
 import substituteClassApplyAtRules from './lib/substituteClassApplyAtRules'
 
-export default postcss.plugin('tailwind', options => {
+const plugin = postcss.plugin('tailwind', options => {
   options = options || defaultConfig
 
   return postcss([
@@ -25,3 +25,5 @@ export default postcss.plugin('tailwind', options => {
     stylefmt,
   ])
 })
+
+module.exports = plugin